a durable ball and shaft assembly

it can technically serve as a universal backing plate

Easy field adjustment via the screwdriver slot ensures the 2

While designed for RS series sensors

the VST3800 eliminates the communication errors and fitment issues often associated with universal aftermarket controls

Johnson Controls T-4002-301 Conversion Kit R-410A a durable ball and shaftThe Johnson Controls T 4002 301 Conversion Kit is a professional grade solution designed for upgrading or replacing legacy pneumatic thermostats in commercial HVAC systems. This direct acting kit features a 55 85F dial range, providing precise setpoint control for single temperature applications. Engineered for seamless integration into existing pneumatic control loops, the assembly simplifies the transition from older dual tube or single tube